【正确答案】 D

【答案解析】此题属于近义词辨析题。四个词都表示“立刻地”，但着重点不同。选项[A]swiftly强调行为发生的敏捷性，例如：They denied the accusation swiftly．他们很快否认那桩起诉。选项 [B]promptly和选项[C]immediately都含有without delay的意义，例如：I'll deliver your purchases promptly．我会立刻送你买的货。又如：I came immediately after I had had dinner．选项[D]quickly意为after only a very short time，例如：I realized fairly quickly that I was wrong。